I had a bad ide cable which I have now replaced. on bootup the filesystem produced a lot of errors and I lost my first superblock. I since fsck'd and repaired the superblock at sector 32. At no time does fsck create, fix, or transfer the sector 32 superblock to the front of the drive. mount won't accept the drive in the condition it's in(says no superblock, or bad superblock.. different programs, different errors). If anyone knows how I could get my data off and format my /var drive, or possibly repair my damaged superblock at the front of the drive with anyone of the 50-some backups that exist throughout the drive. thanks Darren __________________________________ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com
Owe Jørgensen
2005-Oct-10 01:39 UTC
harddrive won't mount/boot, superblock can't be fixed.
Mr. Darren wrote:> I had a bad ide cable which I have now replaced. on > bootup the filesystem produced a lot of errors and I > lost my first superblock. I since fsck'd and repaired > the superblock at sector 32. At no time does fsck > create, fix, or transfer the sector 32 superblock to > the front of the drive. mount won't accept the drive > in the condition it's in(says no superblock, or bad > superblock.. different programs, different errors). > If anyone knows how I could get my data off and format > my /var drive, or possibly repair my damaged > superblock at the front of the drive with anyone of > the 50-some backups that exist throughout the drive. > > thanks > > Darren > > > > > __________________________________ > Yahoo! Mail - PC Magazine Editors' Choice 2005 > http://mail.yahoo.com > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"try newfs -n <partition> to list the proper superblock backups for the partition. to fix, use fsck_ufs -b <alternate superblock> <device>
Oliver Fromme
2005-Oct-10 04:20 UTC
harddrive won't mount/boot, superblock can't be fixed.
Mr. Darren <darren780@yahoo.com> wrote:
> I had a bad ide cable which I have now replaced. on
> bootup the filesystem produced a lot of errors and I
> lost my first superblock. I since fsck'd and repaired
> the superblock at sector 32. At no time does fsck
> create, fix, or transfer the sector 32 superblock to
> the front of the drive. mount won't accept the drive
> in the condition it's in(says no superblock, or bad
> superblock.. different programs, different errors).
> If anyone knows how I could get my data off and format
> my /var drive, or possibly repair my damaged
> superblock at the front of the drive with anyone of
> the 50-some backups that exist throughout the drive.
How about copying the fixed superblock with dd(1)?
Something like this:
dd if=/dev/ad0s1d of=/tmp/sb skip=32 count=16
dd if=/tmp/sb of=/dev/ad0s1d seek=16 count=16
fsck /dev/ad0s1d
Those commands are just off the top of my head -- I haven't
tested it, no guarantees, you're doing it at your own risk
and you should have a backup.
Best regards
Oliver
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Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
Dienstleistungen mit Schwerpunkt FreeBSD: http://www.secnetix.de/bsd
Any opinions expressed in this message may be personal to the author
and may not necessarily reflect the opinions of secnetix in any way.
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at using rocks to sharpen sticks."
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Mr. Darren <darren780 at yahoo.com> wrote: > I had a bad ide cable which I have now replaced. on > bootup the filesystem produced a lot of errors and I > lost my first superblock. I since fsck'd and repaired > the superblock at sector 32. At no time does fsck > create, fix, or transfer the sector 32 superblock to > the front of the drive. mount won't accept the drive > in the condition it's in(says no superblock, or bad > superblock.. different programs, different errors). > If anyone knows how I could get my data off and format > my /var drive, or possibly repair my damaged > superblock at the front of the drive with anyone of > the 50-some backups that exist throughout the drive. How about copying the fixed superblock with dd(1)? Something like this: dd if=/dev/ad0s1d of=/tmp/sb skip=32 count=16 dd if=/tmp/sb of=/dev/ad0s1d seek=16 count=16 fsck /dev/ad0s1d Those commands are just off the top of my head -- I haven't tested it, no guarantees, you're doing it at your own risk and you should have a backup. Best regards Oliver Thanks, this did the trick. The only odd thing I could say is that newfs -N didn't list 32 as a superblock(fsck told me it was the one being used), I first tried 92640 which was listed after 144. The 32 block worked and the others didn't.. odd.. Thanks a million =) -Darren __________________________________ Yahoo! Music Unlimited Access over 1 million songs. Try it free. http://music.yahoo.com/unlimited/